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  • Title: In vitro effects of serotonin and prostaglandins on release of eggs from the ovary of the scallop, Patinopecten yessoensis.
    Author: Matsutani T, Nomura T.
    Journal: Gen Comp Endocrinol; 1987 Jul; 67(1):111-8. PubMed ID: 3476349.
    Abstract:
    When ovarian pieces of the scallop, Patinopecten yessoensis, were incubated in media containing serotonin (5-HT), the number of released eggs increased significantly. These eggs developed normally after fertilization. The threshold of the 5-HT effect reached a maximum at a concentration of 10(-6) M, and decreased sharply with increasing concentrations. Methysergide, a 5-HT antagonist, completely inhibited the 5-HT-induced egg release. Addition of aspirin or indomethacin to the incubation media also inhibited the 5-HT effect. However, neither aspirin nor indomethacin inhibited the 5-HT-induced egg release when 10(-6) M prostaglandin E2 (PGE2) was also present. PGE2 did not induce egg release, but enhanced the 5-HT effect. In contrast to PGE2, PGF2 alpha significantly inhibited the 5-HT effect. These results show that 5-HT induces spawning of female P. yessoensis via specific 5-HT receptors in the ovary, and that the effect of 5-HT may be regulated by PGE2 (progressive) and PGF2 alpha (suppressive).
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